ADTRAN AHDSL2 specifications Table A-1. In-Band Addressable Loopback Codes

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Table A-1. In-Band Addressable Loopback Codes

 

 

 

Function

Code

Response

 

 

 

1 in 31

100

Loop down everything.

 

 

 

1 in 61

100000

Loopback at the H2TU-R toward the network; must be armed before

 

 

initiated.

 

 

 

4 in 7

1111000

Loopback data from network toward network in the H2TU-C.

 

 

 

6 in 7

1111110

Loopback data from customer toward customer in H2TU-C.

 

 

 

FF1E

1111 1111 0001

Loopback data from network toward network at H2TU-C.

 

1110

 

 

 

 

3F1E

0011 1111 0001

Loopback data from customer toward customer at H2TU-C.

 

1110

 

 

 

 

Arm1 (also known

11000

If the pattern is sent from the network, the units will arm and the H2TU-R

as 2-in-5 pattern)

 

will loop up toward the network. No AIS or errors will be sent as a result

 

 

of this loopback. If the pattern is sent from the customer, all units will

 

 

arm.

 

 

 

Arm (ESF Data

FF48

If the pattern is sent from the network, the units will arm and an H2TU-R

Link)

1111 1111 0100

network loopback will be activated. This code has no functionality when

 

1000

sent from the customer.

 

 

 

Disarm1 (in-band)

11100

When sent from the network or customer, all units are removed from the

(also known as

 

armed state and loopbacks will be released. If any of the units are in

3-in-5 pattern)

 

loopback when the 11100 pattern is received, they will loop down. The

 

 

LBK LEDs will turn off on all units.

 

 

 

Disarm1

FF24

When sent from the network or customer, all units are removed from the

(ESF Data Link)

1111 1111 0010

armed state and loopbacks will be released.

 

0100

 

 

 

 

H2TU-C Network

D3D3

If the units have been armed and no units are in loopback*, the H2TU-C

Loop Up1, 2

1101 0011 1101

will loop up, 2 seconds of AIS (all ones) will be transmitted, the looped

 

0011

data will be sent for 5 seconds, and then a burst of 231 logic errors will be

 

 

injected. The burst of 231 logic errors will continue every 20 seconds as

 

 

long as the D3D3 pattern is detected. When the pattern is removed, the

 

 

unit will remain in loopback. If the pattern is re-instated, the injection of

 

 

231 logic errors will continue every 20 seconds. If the pattern is sent from

 

 

the network, the loop up and error injection will be toward the network. If

 

 

the pattern is sent from the customer, the loopback and error injection will

 

 

be toward the customer.

 

 

 

H2TU-R Address

C754

When sent from the customer, an H2TU-R network loopback is activated

20 for extended

1100 0111 0101

and a 200-bit error confirmation is sent. Two seconds of AIS (all ones)

demarc1

0100

will be sent, 5 seconds of data will pass, and then 200 bit errors will be

 

 

injected into the DSX-1 signal. As long as the pattern continues to be sent,

 

 

200 errors will be injected every 20 seconds. The HDSL2 office unit will

 

 

not block transmission of far end NIU loopback from the customer premise

 

 

(H2TU-R).

 

 

 

Note: All codes listed above must be sent for a minimum of 5 seconds in order for them to be detected and acted upon. * If NIU is enabled, then the H2TU-R can be in network loopback when the H2TU-C loop up codes are sent.

1The H2TU-C and H2TU-R individually detect and act upon in-band loopback control codes. Depending on which list number of

H2TU-R is used with the Litespan H2TU-C, some of these control codes may not cause action (such as loop up, error injection, etc.) at the H2TU-R.

Refer to the H2TU-R documentation for supported control codes.

2Units must be armed with 11000b or FF48h before this code will work

3In order to behave like a NIU, the H2TU-R will not loop down from the network side with 9393h.

4 This code will be detected only if the units are armed OR if any loopbacks are active.

A-2

61221002L2-5B

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Contents Revision History L2-5B Issue 2, August Clei Code SLL5R3DGFeatures GeneralLED Indicators Part Number DescriptionInstallation ApplicationsProvisioning ComplianceCompliance Codes Cross-Connect Commands Provisioning CommandsAdministration Commands Maintenance CommandsHdsl Provisioning Commands T1 Provisioning CommandsPower Requirements Testing CommandsAlarms Testing CommandsPower Parameters Deployment GuidelinesLoop Insertion Loss Data MaintenanceHDSL2 Loss Values Warranty and Customer Service Troubleshooting ProceduresProduct Specifications Adtran H2TU-C Specifications Loop InterfaceThis page is intentionally blank Loopback Control Codes Hdsl Maintenance ModesLoopback Process Description Table A-1. In-Band Addressable Loopback Codes Dbdb This page is intentionally blank Maintenance Menu Provisioning Menu Testing Menu Main Menu20. T1 Maintenance Menu Maintenance Menu and Associated SUB-MENUSHdsl Maintenance Menu Additional Hdsl Maintenance Commands Hdsl Maintenance MenuRTRV-ALM-HDSL Command INIT-REG-HDSL CommandRTRV-PM-T1 Command T1 Maintenance MenuINIT-REG-T1 Command INIT-REG-T1Hdsl Provisioning Menu Provisioning MenuCross-Connection Menu 15. T1 Provisioning MenuDLT-CRS-T1 DLT-CRS-T1 CommandCROSS-CONNECTION Menu ENT-CRS-T1ENT-CRS-T1 Command RTRV-CRS-T1 CommandED-HDSL ED-HDSL CommandsHdsl Provisioning Menu ED-GOS-HDSLED-GOS-HDSL Command MONTYPE= ES, SES, UAS, LA, SNR, CVT1 Provisioning Menu ED-GOS-T1 CommandED-T1 Commands ED-GOS-T1OPR-LPBK-HDSL Testing Menu← Enable a loopback RLS-LPBK-HDSLH2TU-C Customer Loopback Initiating Mtau Test Access Figure C-1. Split ModeFigure C-2. MON Mode Removal of Mtau Test Access

AHDSL2 specifications

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